Thermally-insulating coating system

Abstract

A thermally insulating coating system for curved and/or hardened glass panes includes at least one layer of noble metal enclosed by a lower and an upper blocker layer. An underoxidic NiCrO x layer with a thickness between one Å and two nm is embedded into the noble-metal layer. The advantage is that the optical qualities of the coating system are not influenced by the tempering and curving of the glass pane.

We claim:  
     
       1. A thermally-insulating coating system for a curved and/or hardened glass pane, comprising: at least one noble metal layer enclosed by a lower blocker layer and an upper blocker layer, wherein an underoxidic NiCrO x  layer is embedded into the noble metal layer, wherein the embedded underoxidic NiCrO x  layer has a thickness between 0.1 and 3.0 nm. 
     
     
       2. The coating system according to claim  1 , wherein the blocker layers enclosing the noble-metal layer consist of underoxidic NiCrO x  or underoxidic NiCrO x  and TiO 2 . 
     
     
       3. The coating system according to claim  1 , wherein the noble metal layer is a silver layer. 
     
     
       4. The coating system according to claim  1 , wherein the noble metal layer is a silver layer which is precipitated with a slight oxygen component, wherein the oxygen component is present in an amount such that an electric resistance of the noble metal layer does not exceed 10%. 
     
     
       5. A thermally-insulating coating system for a curved and/or hardened glass pane comprising the following layers oriented outward from the glass pane: 
       a layer of TiO 2  with a thickness of 16 nm,  
       a layer of NiCrO x  with a thickness of 6 nm,  
       a layer of TiO 2  with a thickness of 6 nm,  
       a layer of Ag with embedded NiCrO x , wherein the embedded NiCrO x  in the layer of Ag has a thickness of 1 nm,  
       a layer of NiCrO x  with a thickness of 4.5 nm, and  
       a layer of Si 3 N 4  with a thickness of 50 nm.  
     
     
       6. The coating system according to claim  1 , further comprising a TiO 2  layer, which suppresses light scattering arranged between the lower blocker layer and the noble metal layer. 
     
     
       7. A thermally-insulating coating system for a curved and/or hardened glass pane comprising the following layers oriented outward from the glass pane: 
       a layer of TiO 2  with a thickness of 16 nm,  
       a layer of NiCrO x  with a thickness of 6 nm,  
       a layer of TiO 2  with a thickness of 6 nm,  
       a layer of AgO x  with a thickness of 8 nm,  
       a layer of NiCrO x  with a thickness of 2 nm,  
       a layer of AgO x  with a thickness of 8 nm,  
       a layer of NiCrO x  with a thickness of 4 nm, and  
       a layer of Si 3 N 4  with a thickness of 50 nm.  
     
     
       8. A glass surface having adhered thereto a thermally-insulating coating system comprising at least one noble metal layer enclosed by a lower blocker layer and an upper blocker layer, wherein an underoxidic NiCrO x  layer with a thickness between 0.1 and 3.0 nm is embedded into the noble metal layer. 
     
     
       9. The glass surface according to claim  8 , wherein the blocker layers enclosing the noble-metal layer consist of underoxidic NiCrO x  or underoxidic NiCrO x  and TiO 2 . 
     
     
       10. The glass surface according to claim  8 , wherein the noble metal layer is a silver layer. 
     
     
       11. An automotive windshield coated with the thermally insulating coating system of claim  1 . 
     
     
       12. A method for making a glass pane or panel of thermal insulating properties comprising depositing by sputtering onto said glass at least one noble metal layer enclosed by a lower blocker layer and an upper blocker layer, wherein an underoxidic NiCrO x  layer is embedded into the noble metal layer wherein the embedded underoxidic NiCrO x  layer has a thickness between 0.1 and 3.0 nm.